Flat Mailer Boxes
Shallow-depth corrugated mailers engineered to prevent bending, corner impact damage, and excess postal charges. Manufactured direct from the factory with rigid E-Flute kraft board and precision rotary die-cuts.
Configure Your Custom Mailer Boxes
Wholesale tiered pricing directly from the packaging floor. Receive an engineering review and guaranteed quote within 2–4 business hours.
Quote Request Received by Packaging Engineering
We are preparing your custom dieline template and wholesale volume rate breakdown. A packaging specialist will contact you at within 2–4 business hours.
Frequently Asked Factory & Manufacturing Questions
Transparent answers on minimums, production timelines, dielines, and corrugated board specifications.
What are flat mailer boxes best used for?
Flat mailer boxes feature shallow depth (typically 1" to 2.5") engineered specifically for flat goods that require edge crush defense without excessive air space — including folded shirts, art prints, posters, books, calendars, and certificates.
Do flat mailer boxes reduce shipping costs?
Yes. By minimizing internal air space, flat mailers fit into lower carrier dimensional-weight (DIM) tiers, drastically reducing postage and parcel shipping expenses.
What is the MOQ for custom printed flat mailers?
500 units per custom size and artwork design. We offer both single and double-sided printing directly from our manufacturing floor.
Have a technical question about burst test ratings or dieline fitment?
Consult directly with a packaging engineer via email at sales@mailerboxfactory.com or configure your specs in our Quote Configurator.